Table 1 Selected free parameters evaluated in the EE analysis with their default value and range. Bold faced variables came out as most influential according to the EE analysis (highest EE ranks) and used in the following step with the GLUE approach. The EE ranks are based on volume changes, shoreline position and bed level.
From: Parameter uncertainty in medium-term coastal morphodynamic modeling
Class | Parameter | Symbol | Default value | Value of21 | Range EE (GLUE) | EE Rank | Unit |
|---|---|---|---|---|---|---|---|
Hydraulics | Chezy bed roughness | C | 65 | 65 | 50–80 | 7, > 10, 9 | \({\text{m}}^{{1/2}} /{\text{s}}\) |
Horizontal eddy diffusivity | \(D_{h}^{back}\) | 0 | 1 | 0.1–1 | > 10, 9, 10 | \({\text{m}}^{2} /{\text{s}}\) | |
Horizontal eddy viscosity | \(\nu _{h}^{back}\) | 0 | 1 | 0.1–1 | > 10, > 10, >10 | \({\text{m}}^{2} /{\text{s}}\) | |
Waves | Wave breaking index | \(\gamma\) | 0.55 | 0.73 | 0.55–0.8 (0.55–0.8) | 4, 3, 6 | - |
Wave breaking limit on time-step level | \(\gamma _{max}\) | - | 0.8 | 0.55–0.8 | 10, > 10, > 10 | - | |
Roller dissipation coefficient | \(\alpha _{rol}\) | 1 | 0.1–2 (1–3) | 5, 3, 6 | - | ||
Roller slope | \(\beta _{rol}\) | 0.1 | 0.01–0.2 | 6, 8, 8 | - | ||
Sediment | Grain size | \(d_{50}\) | - | 300 | 250–350 (200–350) | 2, 6, 2 | \(\mu m\) |
Suspended sediment grainsize scaling factor | \(f\!ac_{dss}\) | 1 | 0.6–1 | 3, 6, 3 | – | ||
Current related bed and suspended transport scaling factors | \(f_{sus}\), \(f_{bed}\) | 1 | 0.5 | 0.1–1 (0.2–1) | 1, 1, 1 | – | |
Wave related bed and suspended transport scaling factors | \(f_{sus,w}\), \(f_{bed,w}\) | 1 | 0.2 | 0.1–1 | 9, 2, 5 | – | |
Morphology | Transverse bedslope parameter | \(\alpha _{bn}\) | 1.5 | 15 | 1–25 | > 10, > 10, >10 | – |
Longitudinal bedslope parameter | \(\alpha _{bs}\) | 1 | 10 | 1–25 | > 10, > 10, > 10 | – | |
Dry cell erosion factor | \(\theta _{sd}\) | 0 | 1 | 0–1 (0–1) | 7, 3, 4 | – |
